Troweling machine



Oct. 20, 1931. T N 1,828,576

TROWELI NG MACHINE Filed May 20, 1929 2 Sheets-Sheet 1 Z i J WHHESSES v'I'homas I QlCLtL n- ATTOR NEYS T. PALA TINI 1,828,576

Oct. 20, 1931.

TROWELING MACHINE v 2 Sheets-Sheet 2 Filed May 20, 1929 INVENTOR ThomasPalalii/rw ATTORN EYS Patented Oct. 20, 1931 y Application filed may 20,

v e 'a troweling machine wherein a plurality of power driven trowels areprovided and means" associated therewith for supporting the trowels sothat ftheyfwillfunction in a horizontal; or vertical position so as totrowel pavements, walls, ceilings or the like.

A- further. object of the invention, more specifically, is to provide atroweling machine especially adapted for troweling pavements, thearrangement being such that a power ele ment is carried by a frameworkand an auxiliary frame is associated therewith carrying the trowels withmeans for raising or lowering the trowels so that they may be adjustedand also so that they may be moved from place to place Without contactwith the supporting surface.

In the accompanying drawings,

Figure 1 is a top plan View of a troweling machine disclosing anembodilnent of the invention, the same beingshown in position for use;

Figure 2 is an end view of the structure shown in Figure 1;

Figure 3 is a front view of the machine shown in Figure 1;

Figure 4 is a fragmentary sectional View through one of the trowelingmachines and associated parts;

Referring to the accompanying drawings by numerals, 1 indicates a batchor section of concrete pavement which has been laid, and which is to besmoothed by hand trowels or some other means.

In the present instance a troweling machine has been positioned over thebatch 1, as shown in Fig. 1, and this machine is adapted to movelongitudinally over batch 1 and to trowe1 the same as it travelsthereover. The device may be moved over batch 1 once or a number oftimes, as the occasion demands. In order that the troweling machineembodied in the invention shall function propf 'raownmne MACHINE v 1529.Serial noqsessas. I erly the side boards 2 and 3 used as moulds forthe'cement batch 1 also act as tracks for the various trolley wheels 4and 51 These wheels are carried by axles 6 and 7wl1ich e'xtend throughsuitable bearings carried on the under surface of the main frame- 8. Ontop of themain frame 8 is positioned an aux-- iliary frame 9 which isadapted to be moved upwardly and downwardly for dififerent purposes. Themain frame 8 may be metal, wood or other material'and acts as a truckforgcarrying the auxiliary frame 9 and as]- sociated parts. Alsomounted'on the' main frame isa platform 10 carrying the prime moverllgsaid prime mover being shown as an electric motor, although someother form of primemover may be used. The armature of motor 11, isconnected throughsuitable F 'rnoivms PAL TI I; or Barman, NEW JERSEY:

gears 12 to the shaft 13 and also'tothe shaft 14. Shaft 13 'carries'apulley 15, andshaft 14L carries a pulley 16. A belt 17 passesoveifpulley I16 and also the pulley 18 which is rigidly secured to shaft 7,whereby this shaft is rotated whenever motor 11 is'functioning. Thiscausesa rotation of the traction wheels 5, whereby the entire machine ispropelled along over the tracks 2 and 3. The rotation of the wheels 5 isslow compared with the various troweling disks 19, 20,21, 22'and 23. Thepulley 15 accommodates a belt'24' which passes over pulley 25, saidpulley 25 being a double pulley, so that belt 26 may pass there over andover the double pulley 27, and a belt 28 passesover double pulley 27 andoverv dou-;

ble pulley 29. A cross belt also passes over pulleys-29 and over thedouble pulley 31. A belt 32 passes over thedouble pulley 31'and overpulley 33. Pulley 25 is rigidly secured to shaft 34, While pulley 27.isrigidly secured to shaft 35, whereby powerfrom pull'ey 25 will betransmitted to pulley 27 and thence through the belt 28 to pulley 29which is rigidly secured to shaft Power is transmitted'from pulley 29through the cross belt 30, to pulley 31 which is'rigidly secured toshaft 37. Belt 32 transmits power from pulley 31 to pulley 33, whichlatter pulley is rigidly secured to shaft 38; By reason of theconstruction just described the various shafts carrying the varioustroweling :disks are driven through power derived from the motor 11.Each of these disks is supported by a thimble 39 (Fig. 4), which thimbleis connected in any suitable way to one of the transverse bars 40 of theauxiliary frame 9. Each of the trowels is formed with a flat bottomsurface 41, as shown in Fig. 4;, and this surface merges into aninclined peripheral flange 42. As indicated by the arrows in Fig. 1, thetrowels 19, 20 and 21 operate in the same direction, while the remainingtwo trowels operate in a reverse direction. The constant rotation ofthese trowels will produce the desired troweling effect on the concretebatch 1 and as these trowels may be operated at a comparatively highspeed the machine may be moved rather rapidly over batch 1 and yetproduce a good troweling action. It is known that heretofore in mostinstances hand trowels were moved back and forth over a batch ofconcrete, as for instance, a concrete sidewalk. This was to smooth thesurface and to make a closer texture adjacent the surface. At eachcorner of the auxiliary frame is a screw 43 which has an abutment orshoulder 14 and a reduced guiding extension 45. By rotating these screwsin the desired direction the auxiliary frame 9 may be raised or loweredslightly so that the troweling disks will operate at the desired level.Where the machinehas been moved over a batch of pavement in order totrowel the same and it is thought necessary to subject the batch to asecond troweling operation the auxiliary frame 9 is raised bodilyupwardly so that the troweling disks will be operated an appreciabledistance above the concrete batch. The machine. is then pushed manuallyback to its starting point or the prime mover is reversed and the machine propelled back to its starting point. After having reached thestarting point the auxiliary frame 9 and associated parts are loweredand a second troweling operation is performed. In order to provide aquick raising and lowering of the frame 9, shafts 46 and47 are mountedon the respectiy e frames illustrated particularly in Figs. 1 and'2, andsimilar shafts 48 and 49 are mounted at the opposite sides of therespective frames. Shafts 46 and 47 are'connected together by suitabletoggles 50 at each'end, and similartoggles 51 connect shafts 48 and 49at each end. Links 52 and 53, as shown in Fig. 1, connect certaintoggles so that when the hand lever 54; is moved for shifting one of thetoggles 50 motion will be transmitted to allthe other toggles andconnected parts, whereby the frame 9 will be raised or lowered accordingto the direction of movement of lever 54. This raising and lowering ofthe frame is onlyslight, asfor instance, an inch or possibly two inches,and the belts 17 and 24 will permit this movement without becomingdislocated."

What I claim is 1. In a troweling machine, a plurality of trowelingdisks, means for rotating said disks and a pair of frames for supportingand moving the disks during their operation, one of said frames beingprovided with traction wheels and the other frame being provided withthreaded members for varying the distance between the respective frames,and means coacting with both frames for quickly elevating one frame andall of said disks, whereby the machine may be moved from one place toanother without the disks contacting with the ground. p 2. In atroweling machine of the character described, a plurality of trowelingmembers, and means for supporting and driving said trowelingmembers,.said supporting means including a rectangular frame providedwith traction wheels, an auxiliary frame mounted on the first-mentionedframe,'anda screw at each corner of the auxiliary frame, each of saidscrews being provided with a shoulder and a depending restrictedextension loosely fitting into the first-mentioned frame, whereby .whensaid screws are moved the frames are adjusted in relation to each otherfor varying'the contact of said troweling members.

THOMAS PALATINI.

